Pocket air velocity gauge

Details Pocket air velocity gauge Pocket air velocity gauge

1986-06-19

1987-12-22

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring thrust or drag forces

7386153, G01F 128

Patent

active

047139722

ABSTRACT:
In a pocket air velocity gauge, in order to expand the controlled, flow-dependent pointer deflection and the measuring scale to an angular range of at least 270.degree., the air flows through an inlet opening (22) on the back of a housing into a ring channel (12) extending around a pointer shaft (6) and over about 360.degree. and leaves it through a lateral outlet opening (13). In so doing, the air moves an air vane (37) fastened to the pointer shaft (6) counter to a restoring spring force in proportion to the velocity of the air. The ring channel (12) is provided with a cross section widening in the flow direction, and the pointer shaft (6) has assigned to it a second restoring spring which becomes active only after a certain angle deflection of the pointer.

REFERENCES:
patent: 2355694 (1944-08-01), Ardelt
patent: 2690671 (1954-10-01), Obermaier et al.
patent: 3463003 (1969-08-01), Pierman et al.
patent: 3910114 (1975-10-01), Rasaen

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